...But does the Khmer script follow this rule? Please bear in mind that I know nothing about this script. But in TUS v4.0 10.4 p.281 I read:
Thus a combining character sequence *cannot* contain a ZWJ or any other Cf.
... Such a sequence would not correspond to anything used in a natural language.
Mark __________________________________ http://www.macchiato.com â ààààààààààààààààààààà â
Ordering of Syllable Components. The standard order of components in an orthographic
syllable as expressed in BNF is
B {R | C} {S {R}}* {{Z} V} {O} {S}
where
B is a base character (consonant character, independent vowel character,
and so on)
R is a robat
C is a consonant shifter
S is a subscript consonant or independent vowel sign
V is a dependent vowel sign
Z is the zero width non-joiner
O is any other sign
The first example given using ZWNJ, on p.282, starts with ba + ZWNJ + triisap + ii, i.e. <1794, ZWNJ, 17CA, 17B8>. 1794 is a base character (Lo), but 17CA and 17B8 are class 0 combining characters (Mn). The syntax implies that other Mn characters, e.g. robat, 17CC, may occur between the base character and the ZWNJ. So here is a case in natural language where ZWNJ may be both preceded and followed by combining characters, giving a technically defective combining sequence. Or have I misunderstood things here?
Note that I am not proposing a change to Khmer, but just a clarification of definitions and the consistency of their application, and a good reason why what is allowed in Khmer would not be allowed in Hebrew.
-- Peter Kirk [EMAIL PROTECTED] (personal) [EMAIL PROTECTED] (work) http://www.qaya.org/
